Pacifog was a mind altering chemical weapon produced by a macrolyzer—Imperial technology designed to specifically manufacture and filter the gas— in a laboratory orbiting the planet Kadril. The project was overseen by Darth Vader and was produced sometime after the Battle of Yavin. The goal of the project was for the production of a compound that would bring about the weaker qualities in other individuals. These would be characteristics that Imperial forces would be able to exploit in battle.